Did you re-scan for channels on each TV as you move the RV to new locations? If each TV has cable connections and they are connected to the same antenna you may have bad connections at the splitter. You may have to replace the splitter and cut and make new ends on your cables. Is your bed room tv attached to the cable and is it the first connection in the cable from the antenna?
You might get better tips and feedback in a forum for larger RVs like your Bighorn, such as http://irv2.com - This forum is for small molded fiberglass trailers, and if they have a TV at all, it's usually a small LCD in one location.
"You can't buy happiness, but you can buy an RV. And that is pretty close."